Function Convert-HexToByteArray {

    [cmdletbinding()]

    param(
        [parameter(Mandatory=$true)]
        [String]
        $HexString
    )

    $Bytes = [byte[]]::new($HexString.Length / 2)

    For($i=0; $i -lt $HexString.Length; $i+=2){
        $Bytes[$i/2] = [convert]::ToByte($HexString.Substring($i, 2), 16)
    }

    $Bytes
}

$bytes = [System.IO.File]::ReadAllBytes('title.tmd')
$file = Get-ChildItem -recurse | Where{$_.Name -match "^[0-9a-fA-F]{8}$"}
$nameBytes = Convert-HexToByteArray($file.Name)
for ($i = 0; $i -lt 4; $i++) {
    $bytes[480+$i] = $nameBytes[$i]
    'title.tmd: {0} => {1}' -f $bytes[480+$i],$nameBytes[$i]
}
[System.IO.File]::WriteAllBytes('title.tmd',$bytes)
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